Green tea is just a kind of tea, any kind of food does not have the efficacy of medicine, but tea contains carbohydrates and other nutrients can supplement the body needs. Green tea is one of the tea leaves, 100g of tea (dry) will contain 7.5 grams of water, 1522kg of energy, 34.2 grams of protein, 2.3 grams of fat, and 5.7 grams of ash powder and 50.3 grams of carbohydrates. The brewed tea water can also provide the body with a certain amount of nutrients, but it does not have the efficacy to cure diseases. Green tea is relatively common, but from the food point of view to analyze does not have the effect, so it is not recommended that we blindly believe, and it is recommended that before going to bed do not drink a lot of green tea, to avoid affecting the human body sleep. Green tea on the stomach stimulation, patients with basic stomach problems need to control the intake of green tea.